That's the way it's done in NASCAR - which has a similar rule. For instance, driver Mark Martin is registered as the owner of Matt Kenseth's #17 team. Next year, though, NASCAR is instituting a rule that will limit ownership to four teams. And to enforce the rule, NASCAR is demanding that owners submit their tax records. To get around the rule team owners might be inclined to hide their ownership assets from NASCAR, but it's less likely that they'll be willing to lie to the IRS. That being the case, I think that such a rule can be enforced if a sanctioning body is serious about it.